Chicafxo



' sept 11, lsza *mi ELEVATOR PLATFORM l Rg 17,08()

Urlrginal Filed July I4, 19 6 fw j y] Renamed` sept. 11, 1928.

Re. 17,086 i UNITED sflirres*g PATENT loF121.er...yA g; 1

y JUSEPH'RICE, or CHICAGO', ILLINOIS, Assenoa To stavi-iron contraint.or Mening Q11. cme-m0,. Immers, A

CORPORATION or iLLINois.

l ELEvAToR rnnfirozsis/r.v

originau- 1110.,l 1,6233911,

dated April 12", 1827, Serial No.

122,367,11-1ea Jing 14;' 111116.I Appiieation for reissue/.nea June 25;1923. sers-a1? 110,288,212.

5 contre-l mechanism. i

1n one of its forms, my invention'i-s-particulalrly applicable toelevatorsot the type which` are operated bythe user. These elevators aregenerally or the push-button type softhat the, operation-ot' aepus'hbuttonr corre` spending to a floor or the buildingwill automaticallycause the carto move to that particularI rl'oor and* stop there. lfnapparatus oflthiskind; there is a; door forthe lratchW'a-y and there isalso .a door provided upon the carg and the control mechanism is so arrangedJ that the user is unable to brin-g about a movement `ofthe carunless both the `hatch door and'y the ycar door'are closed. This 1sd'one in order to prevent4 accidents. Now it sometimes happens that whenthe user leaves the can he for ets to close the door', hut-he doesAclose thelhatcl'iwa J- door; Under such circumstances, it woulde'impossible-for'any prospective user desiringv tousethe car to'ringthe'car to another fio'or, as 'the car conL trolz apparatus' is'left inoperative lbecause-ot the' opencarldoor. v -f To avoidthiscontingency, my invention 3o contemplates a movable platform within thecarplatformwhi'lch is soarranged that' whenone. ormore'persons stand`upon this; plat'- form,y an electric switch'mechanismpwhich1sinparallel"y with the switch mechanism ot the l car doorpisop'en", so;that betorelthequser within carcan operatet'he car, r1t1s necessary forboth l'the car door andi hatch door to' be closed. Should the car,however, be"l empnty and; standingat a; Hoor, 'then the"1nova"le 40platform' moves back into its 1 circuitclosing fosiftioni soA that. theswitch mechanismconf `arallfe'l4 with' the1`swit"ch" mechanism'fcon-`grolled bythe ear doorywill permit operation of `the car from' yanotherlfloor so; long as. the hatch doorsl are closed. Inl otherwords, in orderyfor the' car to operata it is essential all'y instances-that the hatchdoorbe' closed, and5` as ai second" condition, the Vcar must eitherrbeunoccupied or the car'door must be y closed.n

My invention "concernsitself with new and.

improved means for bringing about the proper movement of thecarplatform. v `My vinvenbe'utilized to effect agovernm-g orcontrollingmtlfuenee .over cai'l milled;l by this param, and which is1n` tionv contemplatesthe provision,l oi suc'l'r means whichfwillrequirethev leastamou-nt oi movement and which at the same time. will provide aplatform having the necessary stability so yas not to'` provide aplatformf Whichis uncomfortable 'toi-the occupants of' *il* the carl,The movements or' my platform arev so slight as to? he hardly noticeableandithey recoil movement is of such a nature that il 1s smooth and even.

I will describe one form which my inven :tion may take more `in detailbyreferring" to' the accompanying drawing in Which- Figrl is a topview o1'a platform" con-` structed in accordance with 'my invention, i car andhatchvvay `framework being" shownin' section, and certain portions ofthe. platform' being broken away moreclearly tor'evealt features ofconstruction;

Fig. 2 is al sectional view .along lines 2 ini Fig. 1; and i y i I Fig;3 is a` sectional view along lines" :3-3:' of Fig. 1.'

In accordance with my invention', lf prov,- vlde a car framework l()consistingfprefeitably ot" four sides, `top and bottom, thebot'4 tomportion 'ofl the framework being shown at 11. The car is inaj'hatchvvaysurrounded bythe hatch Wall 12', andg a hatch"door'13con.trols ltheentrance.y through' thedoor opening* 14; The hatch doorldsdesigned to shorta circuit a pair of contacts,' of'which'one, thefcontact 15, is shown Wllf@neverv this hatch` door 1B vis in its closedposition. The closure "of the circuit through the contacts 15 closescircuit through wiresv 1'6` and 17. Theco.-V operation of `these wireswith otherskwill" presently be explained.` l

The car also hasa collapsible" Adoor' which collapsible door isshovvnfin itis operi positionv in Fig. 1*,4b11t 'which7 when closed',

is adapted to closecircuitthroughta similar y pair of contacts'li?"`r ofwhich one, the contact' i between the two frameworks 23 'and 424' aremove downwardly Y framework through :the agency of the screw The otherextremity of the spring abutsv provided balls 25,*.Which balls form abearing so that theframework23 may roll over vthe framework 24. Byvirtue of this constructiomit will be notedthat,if a weight is'placedupon the platform 22, the 'said platform will, by reason` of .thisconstruction, and. tothe left (Fig. 2). Such action of the platformwould be against the pressure of thesprings 25. These-springs areinterposed between `the car frameworkand the platform and are of such aas to hold the platform 22 in the shown in Fig. 2 unless the weight ofson is upon said carplatform.

One extremity of the spring 25 is mounted -in a cup 26 which is ajustable uponthecar streng th oneperagainst a shelf 28 extendindownwardly from the platform 22, a suita le lug 29'confining this springto its proper position, Now, whenever the platform is Vin .the positionshown in Fig. 1, twospring backed contacts 30 and 31 which areilpsulatinglymounted upon the car frame- Wor Y.

the spring fingers and 19 is similar to that V platform 22 when in thedisclosed for .the spring backed fingers .30 and 31. These spring backedfingers are; i11- sulatingly mounted'in a support 32. The carries acontact plate 33 which, position in Figs. y1 and 2, shortcircuits thecircuit acrossthe wires 34 and 35.

whenever a weightis placed upon the form equivalent to that of thelightest Now, plat- Pery f -son who' would kever be supposed to operatethe car, then theV platform 22 moves downwardly against the Vaction ofthe springs 25 opens the circuit through, lthe spring backed fingers30and 3 1; vThe wires 34 and l, 35 are connected in'parallelwith'the'wires y A1 Afurther lconductor 36,

l application.l

sults if I providerunwa balls 25, which have afsightlyincreasedini 2021, as vclearly apparent. Y The conductor 17 fisv thenconnected totheconductors 21 and 35.v lThe conductor 16 vextendsgaway from `:the

carl and controls suitable mechanism which v permits or prevents theoperation of the car. which is joinedto extends in parallel Now,thearrangecircuit across conthe conductors 20 and 34, with the conductor 16.

thecar caribe operated, and under these conditions a circuit must becompleted` throughV the vspring fingers15 and either .the spring fingers19 orA the spring fingers 30 and 3l, all as explained in theintroductory part of this Ifind that I obtain exceptionally good res37and 38 forfthe Y clination to the inclination of the frame'- works 23and 24. I get a smooth and morel positive action. A'ledge 39 isprovidedupon the car platform which limits the movement way sectionconsistingof the elements 3 7 It will also position a circuit is closedacross- The construction and arrangement of fingers 30 and 31 so as toclose' limit the movement of ing av pair of interposed A spring tendingto move said 'frameworkupv of the car platform in response to theactuation of the springs 25. A similarledge ai right. angles 40 limitsthe downward move ment of the platform being placed thereon.`

vBy referring to'Fig. 2, therefore, it will be seen that eachset offrameworks 23and 24 has two aligned runwayr sections, each run an( f 38in this particular instance. be apparent that the planes of the inclinedsurface of theelement 38at theright hand section of Fig.- 2 'isnon-identical with the as shown in Fig explained. Y Y, l

',From'whathasubeen thus described, the nature of my inventionwillpbereadily cleartov those skilled in the art, and itvwill also beunderstood that modifications may be made without'departing fr om theVspirit of my in-A vention. Having, however, described one form which myinvention vmay. take., what l desire to" claimand secure Letters Patentis: l

by reason of a. weight l planes of theinclined left hand sect-ion 38,

2. These two planes are, 2 parallel, but they are not ident-ical, asalready 1. A car having a framework, a movable floorcarriedgby saidframework',` car control mechanism responsive to the positionof'saidfloor, and means for Vmovably carrying said. iioor on ksaid ing aninclinedrunway.

2. -A car having a: framework, a movable fioorcarried by said-framework,car control mechanismresponsive tothe position of said floor, means formovably carrying said fioor onsaid. framework, said means including aninclined runway, and a recoil springltendng to' move said frameworkupwardlyupo'n said runway. Q

i 3. A car having a framework, amovable floor carried by said framework,'car control mechanism responsive to the Aposition of said floor, meansfor movably carrying said floor oni-said `framework-Said means includingan inclined runway, and tween said car Vframework and said floor to saidfloor lin both directions.v .s -v l 4. A .car having a framework,amo'vable floor carried yby said framework, car-,control mechanismresponsivetoz'the position of said fioor, and means for movablv carrying^said floor on said framework, said Ineansincludfy parallel inclinedrunways-land balls interposed between said runways.

5. A carlia'ving a framework, a movable framework, saidmeans includl l,

floor carriedby said framework, carcontrol pair of parallel inclinedrunwavs andballs between said runways, and a recoil wardly uponsaidrunway.

`floor carried by said 6. A. car having va framework, a movable loorcarried by said framework, car control mechanism responsive to theposition of said floor, and means for movably carrying said floor onsaid framework, said means compris ing a pair of aligned runway sectionswhose planes of inclination are nonidentical but parallel. y

7. In combination, a framework, a movable framework, electric cir cuitcontrol mechanism responsive to the position of said floor, and meansfor movably carrying said floor on said framework, said means including'an inclined runway.

8. In combination, a framework, a. movable `floor carried by saidframework, electric circuit control mechanism responsive to the positionof said floor, means for movably carrying said floor on said framework,said means including an inclined runway and a recoil springl tending tomove saidframe upwardly upon said runway.

9. In combination, floor carried by said cuit control mechanismresponsive to the po@ sition of said Hoor, means for movably carryingsaid floorv on said framework.l said means including an inclined runway,and stops provided u on said framework to limit the movement of) saidiioor in both directions.

10. In combination. a framework, a movable floor carried by saidframework, electric a framework, a movable framework, electriccircircuit control mechanism responsive to the position of said `floor,means for movably carrying said floor` on said framework, said meansincluding an inclined runway, a recoil spring tending to move said frameupwardly upon said runway, said framework to limit the movement of saidfloor in both directions.

11. In combination, a framework, a movable floor carried by saidframework, means including an linclined runw'ay for movably carryingsaid floor on said framework, said means operating to move said floorlaterally in one direction as weight is placed upon said Hoor. and inthe opposite direction as weight is removed from said floor, an electriccircuit, and means responsive to the position of said floor to open andclose said circuit.

12. In combination a framework, a movable floor carried by saidframework,meansincluding an inclined runway for movably carry ing saidlicor on said framework, said means operating to move said floorlaterally in one direction as weight is placed upon said iioor and inthe opposite direction as weight is removed from said floor, an.electric circuit, and control contacts in said circuit carried by saidframework and said fioor movable into circuit closing position as weightis re- "moved from said ioor and out of circuit closing position asweight is added to said lioor. JOSEPH RICE.

and stops provided upon *i

